Tube-rolling mill.



M. KOCH.

1 TUBE ROLLING MILL.

APPLICATION FILED $1121. 7, 1911.

Patented D80. 31, 1912.

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TUBE ROLLING MILL.

APPLICATION FILED SEPT. 7, 1911.

Patented Dec. 31, 1912.

5 we MM /d alto L142 mandrel is advanced into operative positionand thework piece is :fed into the respec-"J-- STATES A ENT orF oE.

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TUBE-Romano m ni Specification of Letters Patent.

Patented Dec. 31 191 2.

Application filed September 7, 1911. I Serial No. 648,154.

To all whom it may concern:

Be it known that I, MAx KOCH, a subject of the German Emperor, and aresident of Ratingen, Kingdom of Prussia, Germany, have invented a newand useful Tube-Rolling Mill, of which the following is a specification. 7 v I The present invention relates to novel meanstors-advancing and withdrawing the mandrel rodiand for feeding thecharge in tube rolling mills. I 1

The fessential feature of the present in- ;vention consists in that withroller mills jhaving two sets of rolls next to each other .and workingalternately andvin opposite directions and mandrels' on both sides, the

tive'set of rolls by one' and the same operation and by the same,mechanism, which serves to again withdrawthe mandrel after thecompletion of the rolling operation.

In'thie accompanyingadrawing': Figure 1 is aside eleyauomof my' improvedrolling jfle'nlar'ged longitudinal "section through one of the guides;.'Fig. 3 a cross section there-1 mill, showing the .rolisj in se t nig- 2 an through; Fig. 4 a longitudinal section through a modificationof one of the guides;

V Fig. 5 a cross section therethrou h, and Fig.

6 a longitudinal section throug a further modification.

The pairs of rolls 1 and 2 are approached to and removed from each otherin known manner, so that always one pair will be in operative positionand the other inopened v position, the latter in consequence thereofaffording a clear passage for the work piece.

" In the constructional form exemplified in the accompanying drawing thepair of rolls 1 on the left will roll toward the left, and

the pair of rolls 2 on the right toward the right." .As shown in thedrawing, trough.- shaped guide races 7 and 8 are provided on both sidesof the rolling mill, on which races rams or lungers 9 and 10 areprovided for pushing the workpiece. These,

plungers are hollow and serve at the same time to inclose, together withthe races, the mandrel rods 3 and .4 either wholly or to their greaterpart, if necessary together with the mandrel proper and to receive thework piece moved by the working rolls, so that this work piece -cannotbend aside. The rams may be made of a V-shaped or any other-suitablesection. In the constructional form according to Fig. 1, the foremostparts of the rams 9 and 10" are made to move on a hinge 11 and on theroll-housings inclined guide rails 12- are provided next to the races.

The mandrels and rams may be operated.

either .by hydraulic or pneumatic pistons 01" by electric or any othersuitable means.

In the constructional form shown in. the. drawing the hollow rams andthe mandrel rods are advanced by means of arms 16 and 17 guidedtbyrollers 13 along rails'14 and drawn b wire cables 15. These arms d'reconnecte below both to the mandrel rods and the rams; When the arm 17 ismoved toward the roll housing thework piece lying in the race in frontof the end wall 10 of theramglt) will be pushed between the-pair ofrolls 1and against the mandrel 5 behind them. 'It} i s seized by therolls 1 and rolled over the" mandrel 5. In the meantime the "arm 17 hasadvanced the ram 10.with the mandrel 6 so far, that the projection- 10provided on the side of the ram, abuts against the inclined guide rail12, sdthat onthe; ram being further advancedifits foremost part'or head10, swinging on hinge 11, will beraised. ln'consequence thereof theforemost partf oi 'jithe mandrel rod 4 is cleared and will bepushed byarm 17, together with the mandrel 6, which has been attached to itbefore the advancingmotionor thereafter, between the pair of rolls 2close to it, and is by such means brought into operative Position, sothat when after completion 0 the rolling operation of the rolls 1, thework piece is pushed back by the ram 9, this work piece win be pushedagainst the mandrel 6' piece, while headtP-will dem sand 5, and they maybe so out away,as

to leave a clear passageforcthe mandrel rods but not s-uflicient for,the workpiece to pass through. On these hinged end walls are providedlevers 20, which, on the ram being she roll botwe he rolls to enter intothe hol- 5 low rem. These end. walls may also omiiteol altogether anal.in their steed may be used independent. heads or SilClQS 22J{F1g intothe race and hollow of ram and placed between iii?) mandrel rods" beckarid fo; High the same I opposite to each claim:

tuberoil" smiled co' two sets of; mg rolls pair arranged 01:. 01%

Y, will bear elmtments 21 031 '4 iousnig, so that these rem end wallsare TTZUSQG and allow of thmwo'rla piece pes s-- roeeeez posise sidesthereof, mandrel rods receiveol Within said guides, 21. pair of hollowrams inolosin said rods. and adapted to; engage the W01; piece, andmeans for reciprocating saidmanclrel rods and rams.

2 In a tube-rolling mill, two sets of alternately actuated cooperatingrolls a air,

posite sides 'tl1ereof,'m2mdre1 rods received within said guides, a panof hollow rams able relatively to said ramsandediipterl-to ciprooacmgsaid mandrel rods and rams; 2

In a tube-rolling mill, two sets of alternately actuated cooperating1'olls,'a,-'pair of troughsliaped guides arranged on-opposi'te sidesthereof, mandrelrods received within said guides, a pair of hollow ramsinolosing said rods and having hinged heads and means forreciprocating'sa-icl' mandrel rools and mine" MAX HUGH. 7 [11. s.]

sViiiiessesz A. Norma, r g e.- JJ. l U252.

may oibtailied for five Eillils eacii, by evf dressixig theUommi'ssiorier of E'atents M mien"! of: trouglrshaped guides arranged onop inolosiiig said rocls and 'l'iaving heads mov engage the workpiece,and means-for re'- that are adapted to engage the work piece,

